Gemini 4 enters the ring, MI5 flags research ties, Custom GPTs deliver malware

Warlock ransomware continues to exploit year-old SharePoint flaws ShinyHunters member detained in Jordan China-aligned espionage group targets American AI policy experts Get the show notes here: https://cisoseries.com/cybersecurity-news-warlock-continues-sharepoint-exploits-shinyhunters-member-flips-chinas-ai-espionage/ Huge thanks to our sponsor, Vanta Risk and regulation ramping up—and customers expect proof of security just to do business. Vanta's automation brings compliance, risk, and customer trust together on one AI-powered platform. So whether you're prepping for a SOC 2 or running an enterprise GRC program, Vanta keeps you secure—and keeps your deals moving. Learn more at vanta.com/ciso.

Read all the stories at CISOSeries.com. This week's Department of Know is hosted by Rich Stroffolino, with guests Brett Conlon, CISO, American Century Investments, and Nick Espinosa, host, Deep Dive Radio Show. Missed the live show? Check it out on YouTube. The Department of Know is live every Friday at 4:00 p.m. ET. Join us each week by registering for the open discussion at CISOSeries.com. Big thanks to our sponsor, Intezer. If you caught our tips this week, they pointed one direction: investigate everything, and keep the evidence. That's a hard promise to make with people. It's an easy one to make with forensics that run in under a minute. Intezer. The AI SOC trusted by Salesforce, MGM Resorts and Nvidia. See it yourself at intezer.com/headlines.

Report suggests AI and quantum threat preparedness is lacking Authorities seize KillSec extortion group arrest leader Dozens more prominent websites scraped by OpenAI software Get the show notes here: https://cisoseries.com/cybersecurity-news-ai-readiness-reports-killsec-takedown-openai-website-scraping/ Huge thanks to our episode sponsor, Intezer Today's tip: treat every false positive like a bug report against a detection rule. Fix the rule, and that noise stops coming back. Intezer does that for you, so your SOC gets quieter over time instead of louder. Intezer. The AI SOC trusted by Salesforce, MGM Resorts and Nvidia. See it yourself at intezer.com/headlines.

Gemini 4 starts with cybersecurity MI5 flags Chinese research funding Custom GPTs steer users into ClickFix attacks Get the show notes here: https://cisoseries.com/cybersecurity-news-october-1-2026/ Huge thanks to our episode sponsor, Intezer Today's tip: add up the hours your tier-one analysts spent closing alerts that turned out to be nothing. That's your real triage cost. At a hundred and fifty enterprises, that work isn't done by hand. Intezer investigates every alert. Intezer. The AI SOC trusted by Salesforce, MGM Resorts and Nvidia. See it yourself at intezer.com/headlines.

Microsoft details new Star Blizzard and NeedyMantis activity Cloudflare to become a public certificate authority Safety concerns scuttle GPT-6.1 Get the show notes here: https://cisoseries.com/cybersecurity-news-star-blizzard-cloudflare-ca-gpt-6-1-scuttled/  Huge thanks to our episode sponsor, Intezer Today's tip: when an AI calls an alert benign, ask for the evidence. The file, the memory, the command line. If it can't show its work, it's guessing. Intezer shows its work, and your team can argue with it. Intezer. The AI SOC trusted by Salesforce, MGM Resorts and Nvidia. See it yourself at intezer.com/headlines.

GPT-6 Astra goes off script in attack simulations Dutch police arrest "reformed" hacker in ShinyHunters probe Nvidia builds a browser for AI agents Get the show notes here: https://cisoseries.com/cybersecurity-news-september-29-2026/ Huge thanks to our episode sponsor, Intezer Today's tip: time how long an employee-reported phish waits for a verdict. If it's a day, someone already clicked. Salesforce's incident response team got that down to minutes with Intezer. At their size, one click is plenty. Intezer. The AI SOC trusted by Salesforce, MGM Resorts and Nvidia. See it yourself at intezer.com/headlines.

Another Microsoft SharePoint flaw now exploited Details and doubts emerge regarding OpenAI hack of Australian Health portal Kiteworks urges customers to stop using platform Get the show notes here: https://cisoseries.com/cybersecurity-news-new-sharepoint-exploit-australian-openai-hack-developments-kiteworks-urges-stoppage/ Huge thanks to our episode sponsor, Intezer Today's tip: pull your low-severity alerts and count how many got opened. That's where attackers hide. Intezer investigates every alert, boring ones included, in under a minute. MGM Resorts' CTO has talked about nation-state threats turning up right there. Intezer. The AI SOC trusted by Salesforce, MGM Resorts and Nvidia. See it yourself at intezer.com/headlines.

Read all the stories at CISOSeries.com. This week's Department of Know is hosted by Rich Stroffolino, with guests Dmitriy Sokolovskiy, senior vice president, information security, Semrush, and Christian Frösch, CISO, CH Media. Missed the live show? Check it out on YouTube. The Department of Know is live every Friday at 4:00 p.m. ET. Join us each week by registering for the open discussion at CISOSeries.com. Big thanks to our sponsor, Nudge Security. Nudge Security now includes AI Agent Discovery, in addition to Day One discovery of every other AI and SaaS app. For each agent, you'll see who created it, what it's connected to, and risks like destructive permissions. And, smart automation helps you engage the right person to fix the risk.

OpenAI program hacks Australia's government health portal Astrana Health suffers data breach Ransomware gangs exploiting TeamCity flaw Get the show notes here: https://cisoseries.com/cybersecurity-news-september-25-2026/ Huge thanks to our episode sponsor, Nudge Security Here's a question that might make you sweat…how many AI agents are running in your org right now? Not sure? You're not alone. But, we have good news. Nudge Security now includes AI Agent Discovery, in addition to Day One discovery of every other AI and SaaS app. For each agent, you'll see who built it, what it's connected to, and risks like destructive permissions. And, Nudge gives you smart automation to engage the right person to fix the risk. No chasing people down for answers. Give it a try for free at nudgesecurity.com/cisoseries

ShinyHunters peeks at FBI assignments WordPress flaw wastes no time Pentagon's cyber appetite grows Get the show notes here: https://cisoseries.com/cybersecurity-news-september-24-2026/ Huge thanks to our episode sponsor, Nudge Security Here's a question that might make you sweat…how many AI agents are running in your org right now? Not sure? You're not alone. But, we have good news. Nudge Security now includes AI Agent Discovery, in addition to Day One discovery of every other AI and SaaS app. For each agent, you'll see who built it, what it's connected to, and risks like destructive permissions. And, Nudge gives you smart automation to engage the right person to fix the risk. No chasing people down for answers. Give it a try for free at nudgesecurity.com/cisoseries